[turbofan] Handle Smi -> Float32 conversion in representation changer.

src/compiler/representation-change.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/representation-change.h"
 
 #include <sstream>
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 476 matching lines @@
     } else if (output_type->Is(Type::Unsigned32()) ||
                truncation.IsUsedAsWord32()) {
       // Either the output is uint32 or the uses only care about the
       // low 32 bits (so we can pick uint32 safely).
 
       // uint32 -> float64 -> float32
       op = machine()->ChangeUint32ToFloat64();
       node = jsgraph()->graph()->NewNode(op, node);
       op = machine()->TruncateFloat64ToFloat32();
     }
-  } else if (output_rep == MachineRepresentation::kTagged ||
-             output_rep == MachineRepresentation::kTaggedPointer) {
+  } else if (IsAnyTagged(output_rep)) {
     if (output_type->Is(Type::NumberOrOddball())) {
       // tagged -> float64 -> float32
       if (output_type->Is(Type::Number())) {
         op = simplified()->ChangeTaggedToFloat64();
       } else {
         op = simplified()->TruncateTaggedToFloat64();
       }
       node = jsgraph()->graph()->NewNode(op, node);
       op = machine()->TruncateFloat64ToFloat32();
     }
@@ skipping 561 matching lines @@
                                      node);
 }
 
 Node* RepresentationChanger::InsertChangeUint32ToFloat64(Node* node) {
   return jsgraph()->graph()->NewNode(machine()->ChangeUint32ToFloat64(), node);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8